About Yarnell, AZ:

Yarnell is a census-designated place in Yavapai County, Arizona, United States. The population of Yarnell was 649 at the 2010 census. Yarnell's economy is based on ranching, mining and services to travelers and retirees. Peeples Valley, three miles north, is closely linked to Yarnell.

Gold was discovered in Yarnell about 1865 by Charles Genung (1839–1916), a well-known area pioneer. The community is named for Harrison Yarnell, a later prospector, who discovered the Yarnell mine in 1873.